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Discussion Starter #1
I have a fmf 4.1 factory exhaust system and a velocity intake. the one on the pc seems to work ok but it tends to backfire a littlle bit and shoot flames out when i rev it. is this normal or should i get another map? any advice?
 

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ya its prob running lean, id get it dyno tuned to make it run correct, any base maps you find will still not be 100% for you bike, bc of location, sea level etc
 
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